As human demand for renewable energy grows, energy storage technology faces greater challenges. Among many energy storage devices, ferroelectric energy storage film capacitors not only have high power density, fast charge and discharge speed, but also satisfy The trend of device miniaturization has gradually become a hot spot in the field of energy storage devices. In dielectric storage capacitors, energy storage density, energy storage efficiency and temperature stability are three important parameters to characterize their energy storage characteristics. The preparation of ferroelectric energy storage film capacitors with high energy storage density and excellent wide temperature thermal stability has become a bottleneck and a difficult point to overcome.
Recently, Jia Chunlin's scientist studio of Xi'an Jiaotong University passed the selection of BaZr with different components of the same system. 0.15Ti 0.85O3And BaZr 0.35Ti 0.65O3Material, using radio frequency magnetron sputtering technology to grow BaZr with high energy storage density 0.15Ti 0.85O3//BaZr 0.35Ti 0.65O3Multilayer film. By changing BaZr 0.15Ti 0.85O3//BaZr 0.35Ti 0.65O3The number of cycles of the multilayer film increases the number of interfaces, making the interface a hindrance to the development of electrical branches, and improving the epitaxy BaZr 0.15Ti 0.85O3//BaZr 0.35Ti 0.65O3The breakdown field strength of the multilayer film is excellent, and an excellent storage density is obtained at a cycle number of 6. At the same time, the multilayer film exhibits excellent wide temperature stability in a temperature range of -100 ° C to 200 ° C. The results of this study are of guiding significance for optimizing the interface number of multilayer films to improve the energy storage properties of ferroelectric thin films.
The above research results are titled 'Significantly enhanced energy storage density with superior thermal stability by optimizing Ba(Zr 0.15Ti 0.85)O3/Ba(Zr 0.35Ti 0.65)O3Multilayer structure' was published in the authoritative journal Nano Energy (IF=13.12). The work was completed under the joint guidance of Associate Professor Liu Ming and Associate Professor Ma Chunrui, Professor of Microelectronics, School of Microelectronics, Institute of Microelectronics. Professor Jia Chunlin, Senior Engineer of Lulu and Professor Xiaojie Xiao of the Frontier Institute. Xi'an Jiaotong University is the first author and correspondent author, and the German Yulich Institute is a cooperative unit.
The research was supported by the National Natural Science Foundation's major special projects and face projects and youth projects, the national '973' project, the postdoctoral fund, the national basic research development plan and the basic research business fees of the central universities.
